Ground State Properties of the Coupled Spin-Fermion Model in the Weak Kondo Coupling Region

Nobuo Furukawa, Masatoshi Imada

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Two dimensional coupled spin-fermion model as a model for high-Tc oxide is examined by using the perturbation method and the spin wave approximation in the weak Kondo coupling region. The logarithmic singularity appears in the fermion self energy. It is shown that one fermion doped into the Heisenberg spin system forms the self-trapped states of the fermion and spins. The doped many fermions remains localized as the self-trapped states below the critical fermion concentration. The relation to the Kondo effect is discussed. The relevance of our results to optical and photoemission experiments in high-Tc oxides is also discussed.

Original languageEnglish
Pages (from-to)1771-1791
Number of pages21
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - 1990 Jan 1
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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